Peace be upon you A problem, there is no single shape Gas, water, air, stove, for plastic rollers ///////Strong and soft depending on the diameter////// Send a picture of the size or the targeted part for installation... Available according to quality, company, and flexibility. Some can withstand heat, and some can withstand moisture *** It is necessary to match the inner and outer diameter And the width of the rubber&&&&&&& is the same, wide or round There is one centimeter, there is two, and there is half A problem, not studied Different sizes according to grams. Gram. Scale weight 120 parts of a gram 120 grams for 20 riyals according to the second picture 240 grams for 35 riyals