1. Esi sitya se-acrylic senzelwe ukusetyenziswa kwesilwanyana (njengenja kunye nekati njl.)
2. Yenziwe nge-acrylic ephezulu ngexabiso eliphantsi;
3. Ukucaca okuphezulu kombala ocacileyo;
4. Ixabiso elikhuphisanayo kunye nenkonzo engcono kakhulu iya kukuvuza;
5. Isitya senziwe ngezinto zensimbi ezingenasici.inokuhlawuliswa kwakhona kwi-3mm ubukhulu obucacileyo be-acrylic.kwaye ipaneli yangaphandle yenziwe nge-8mm ubukhulu obucacileyo be-acrylic (le yesayizi encinci);
6. Ngobukhulu obahlukeneyo kwinja enkulu.inja encinci kunye nokusetyenziswa kwenja ephakathi;
7.okusingqongileyo kunye nokuqina;
8.umsebenzi omhle,ulula-ukugcina;
I-9.umgangatho kunye nexesha lokuhambisa liqinisekisiwe.