Features: -DURABLE- This pool cover roller is not easily drop and rust, large full solid tires with good balance offer an easy and economical way to take on/off your solar blanket. -ADJUSTABLE- It is suitable for 17.5ft to 21ft wide in-ground swimming pools. Item comes with 7 poles , which makes it easier to store and transport. -BENEFITS- Keep the water warm enough for swimming during shoulder season. In addition, it can keeps debris from falling in your pool. -ECO- The swimming pool cover reel offers a hand crank on one end for smooth operation helps in rolling and unrolling the cover, also equipped with 2 wheels for easy portability and a mechanical lock to prevent rotation of roller when cover is rolled. -UNIVERSAL- Use perfect in rectangular pool, and also can works bean shape pool, kidney shaped, odd shaped, Marilyn Monroe shape, or Oyster shaped pool etc. The straps are fairly long so they could attach to the cover at different points. Specifications: Product Dimensions: 107 x 3.5 x 6.7 inches Item Weight: 20 pounds Shipping Weight: 25.4 pounds Package Included： Telescopic Tub Thermometer Accessories Accessories List Ref. Description Qty. #1 Thread knob 1 #2 Short frame 1 #3 Long frame 1 #4 Crank wheel 1 #5 Shaft 1 #6 Handle 1 #7 Wheels 2 #8 Grip 1 #9 Long hub 1 #10 Short hub 1 #11 Self tapping screw 4 #12 Screw 6 #13 Short screw and nut 1 #14 Long screw and nut 1 #15 Wheel lock washer 2 #16 Cap 2 #17 Lock cap 2 #18 Jig 1 #19 Washer 1 #20 Strap with female velcro 8 #21 Male velcro sticker 8 #22 Buckle 8 #23 Cover clip 8