Grip for construction buckets with rounded wire handle. Measure the thickness of your wire handle and select model with matching dimension: 2.5 mm, 2.75 mm, 3 mm, 3.25 mm, 3.5 mm, 3.75 mm or 4 mm. The grip should snap on wire handles of buckets with diameter of 22 cm (5 L) up to at least around 36 cm (20 L). 
 

I recommend printing in PETG, PCTG or harder TPU. 
 

I tried printing in TPU 95A but the snap fit is a little loose to my likings (even with thicker/more walls).