Our Cranckcase Protections are made with solid materials and they are discharged to get the minimum weight and exploit to the utmost the sturdiness of the materials. They have a good crash and groud-creeping resistance. They are specific for each model. Sometimes you can get one protection ( right or left) or two ( right and left) or they could be three... We sell them separately ( right or left) or as a kit ( in this case the prices are favourable ) ... They can be set up directly where you fix the cranckcases using screws that are included . They are available in ergal in different colours and for some models you can have them in Nylon+FV ( fibreglass loaded so they are stronger compared to the one in Nylon 6.6) but they are only in black and always made of solid material.