俄罗斯采购需求：塑料管件、电缆接头、塑料电缆接头、电缆链

I'm looking for advice on the best type of protection for the free end of PVC pipes to ensure wires are shielded from sharp edges. Would you recommend WQE, WQA, or perhaps another solution? Additionally, I'd like to know if you have an official distributor in Russia where I could purchase these products. Any information you can provide would be greatly appreciated. Thank you!