Polaris 3900 Sport & P39 Gearbox Assembly Replacement | 39-200

Polaris 3900 Sport & P39 Gearbox Assembly Replacement | 39-200

Marsoni

M251S

$158.99

Get it in 3 business days with 1 day shipping. Friday, May 29

Polaris 3900 Sport & P39 Gearbox Assembly Replacement | 39-200The genuine Polaris 39 200 Gearbox Assembly is the mechanical heart of the Polaris 3900 Sport and P39 pressure side pool cleaners, responsible for translating water pressure into the wheel driven movement that propels your cleaner across every pool surface. This complete assembly arrives with all internal gears and bearings pre installed, ready to drop into place between the cleaner's frame and bottom housing. Once seated, it connects to the drive

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We offer a 30-day return/exchange service after receiving.
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These are quite literally the best underwear I have ever worn. I am going to replace all of my underwear with just these. I got the shorter boy shorts cut and they are amazing. These let my body be the shape that my body is, no squeezing or tight waist band. I feel so normal and comfortable in them, they’re breathable and soft!! I absolutely love them after so much trial and error with underwear I finally found the ones!

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Reviewed in the United States on April 20, 2026

Verified Purchase

Taylor

Lake Worth, US

★★★★★ 5

Highly recommend during pregnancy and to wear around the house!

Color: Multicolor a (5-pack), Size: X-Large

Love!! I’m currently 33 weeks pregnant. I’m 5’6” and pre pregnancy weight I would fluctuate between 132-140 lbs easily. I now weigh 162 lbs and my hip is now measuring 40 inches. I bought the XL in the dark grey/black so that it wouldn’t be tight at all around my belly and I absolutely love them! Stretchy, comfortable, breathable. They aren’t loose around my thighs and I can tell they are gonna be nice to wear during post partum. I wear them around the house with an open robe and a bralette for the ultimate comfort. If I were to buy them before pregnancy, I’m positive that a large would have fit beautifully, even though the small/medium measurements on the size chart would have been my pre pregnancy weight, I know they would have been too tight. I detest tight underwear! Highly recommend!

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Reviewed in the United States on May 23, 2026

Verified Purchase

Antoinette

Los Angeles, US

★★★★★ 5

Cute and Comfy

Color: Multicolor B (5-pack), Size: Medium

These are cute and comfy with a great fit. True to size they are cool and comfortable for everyday wear. I was going to order more but the price went up so I'm just waiting for it to go back down to order again.

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Reviewed in the United States on May 18, 2026

Verified Purchase

LAN

Battle Creek, US

★★★★★ 3

Not what I’d hoped

Color: Multicolor a (5-pack), Size: Small

The fabric is nice, soft without being overly bulky. The design was almost what I wanted. I’ve been trying to find underwear that won’t ride up and is comfortable to wear under leggings. The fabric has a LOT of stretch around the legs and deforms quickly. Then it rides up and wrinkles. Smaller leg openings might make the difference.

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Reviewed in the United States on April 1, 2026

Verified Purchase

Hailey Terzich

Carnegie, US

★★★★★ 4

Great & Comfortable

Color: Multicolor B (5-pack), Size: X-Large, Color: Multicolor B (5-pack), Size: X-Large

I have bought 2 packs of this underwear. I love wearing them. They are very comfortable, and the size fits perfectly. I like most of the colors. The Bamboo Cool lettering on the front does come off after washing though. Otherwise the underwear has been great to wear.

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Reviewed in the United States on May 25, 2026