Viega ProPress 2" - 45 Copper Elbow - Double Press Connection - Smart Connect Technology [77043] Anchoring & Docking | Fender Covers the 8" pipe spline post

the 8" pipe spline post for kayaks will do the trick

Cable Length: 15cm

Type: Holding Tanks

This easily installed system includes two adjustable support poles (bright dip anodized-snap ends)

Viega ProPress 2" - 45 Copper Elbow - Double Press Connection - Smart Connect Technology [77043] Anchoring & Docking | Fender Covers the 8" pipe spline postProPress 2" 45 Copper Elbow Double Press Connection Smart Connect Technology Features: For use with ASTM B88 tubing Copper Press connection Components: EPDM sealing elements Specifications: Construction: Copper Box Dimensions: 3"H x 3"W x 6"L WT: 0. 8 lbs UPC: 691514770437 Quick Guide (pdf) Brochure (pdf)