Antheitianshi store via Amazon [amazon.com] has 2-Pack Auh RV Slide-Out Support Jack Stands w/ Drill & Manual Adjust (16.65" - 36.06") on sale for $39.99 - 5% off when you 'clip' the coupon on product page [amazon.com] = $37.99. Shipping is free.

Product Description from Store:

Height range: 16.65" to 36.06"
Load capacity: 5,000 lbs per jack
Material: Alloy steel with zinc powder-coated finish
Gearbox: Aluminum
Color: Silver
Model: AUH-0041
Pack: 2 jacks included
Dual adjustment: electric drill or side-wind handle operation
U-shaped top fits most slide-out frames
Tether pins included to prevent movement during use
Swivel nuts and aluminum gearbox for added durability and stability
Rust and corrosion-resistant zinc powder-coated finish
Compatible with RVs, trailers, ATVs, trucks, utility trailers, and pop-up campers
Lifetime after-sale service included

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2-Pack Auh RV Slide-Out Support Jack Stands w/ Drill & Manual Adjust (16.65" - 36.06") $37.99 + Free Shipping

$38